#!/usr/local/bin/php -f
<?php
/*
	rc.newwanip
	Copyright (C) 2006 Scott Ullrich (sullrich@gmail.com)
	part of pfSense (https://www.pfsense.org)

	Originally part of m0n0wall (http://m0n0.ch)
	Copyright (C) 2003-2005 Manuel Kasper <mk@neon1.net>.
	All rights reserved.

	Redistribution and use in source and binary forms, with or without
	modification, are permitted provided that the following conditions are met:

	1. Redistributions of source code must retain the above copyright notice,
	this list of conditions and the following disclaimer.

	2. Redistributions in binary form must reproduce the above copyright
	notice, this list of conditions and the following disclaimer in the
	documentation and/or other materials provided with the distribution.

	THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
	INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
	AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
	AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
	OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
	CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	POSSIBILITY OF SUCH DAMAGE.
*/

/* parse the configuration and include all functions used below */
require_once("globals.inc");
require_once("config.inc");
require_once("functions.inc");
require_once("filter.inc");
require_once("shaper.inc");
require_once("ipsec.inc");
require_once("vpn.inc");
require_once("openvpn.inc");
require_once("IPv6.inc");
require_once("rrd.inc");

function restart_packages() {
	global $oldip, $curwanip, $g;

	/* restart packages */
	system_ntp_configure(false);
	mwexec_bg("/usr/local/sbin/ntpdate_sync_once.sh", true);
	log_error("{$g['product_name']} package system has detected an IP change or dynamic WAN reconnection - $oldip ->  $curwanip - Restarting packages.");
	send_event("service reload packages");
}

/* Interface IP address has changed */
if (isset($_GET['interface']))
	$argument = $_GET['interface'];
else
	$argument = str_replace("\n", "", $argv[1]);

log_error("rc.newwanip: Info: starting on {$argument}.");

<<<<<<< HEAD
if (empty($argument)) {
	$interface = "wan";
	$interface_real = get_real_interface();
=======
if($argument <> "") {
	$interface = convert_real_interface_to_friendly_interface_name($argument);
	$interface_real = convert_friendly_interface_to_real_interface_name($argument);
	$curwanip = find_interface_ip($interface_real);
	if($curwanip == "")
	        $curwanip = get_current_wan_address();
>>>>>>> FETCH_HEAD
} else {
	$interface = convert_real_interface_to_friendly_interface_name($argument);
	$interface_real = $argument;
}

<<<<<<< HEAD
$interface_descr = convert_friendly_interface_to_friendly_descr($interface);
=======
log_error("rc.newwanip working with (IP address: {$curwanip}) (interface: {$interface}) (interface real: {$interface_real}).");
>>>>>>> FETCH_HEAD

/* If the interface is configured and not enabled, bail. We do not need to change settings for disabled interfaces. #3313 */
if (is_array($config['interfaces'][$interface]) && !isset($config['interfaces'][$interface]['enable'])) {
	log_error("Interface is disabled, nothing to do.");
	return;
}

<<<<<<< HEAD
if (empty($argument))
	$curwanip = get_interface_ip();
else {
	$curwanip = find_interface_ip($interface_real, true);
	if($curwanip == "")
		$curwanip = get_interface_ip($interface);
}

if (!platform_booting())
	log_error("rc.newwanip: on (IP address: {$curwanip}) (interface: {$interface_descr}[{$interface}]) (real interface: {$interface_real}).");
=======
/* grab the prior ip for pftpx tests */
if(file_exists("/tmp/rc.newwanip_oldip")) {
	/* grab hint from dhclient */
	$old_ip = trim(file_get_contents("/tmp/rc.newwanip_oldip", "\r"));
	unlink("/tmp/rc.newwanip_oldip");
}
/* fallback to rc.newwanip ip if needed */
if(!$old_ip)
	if(file_exists("{$g['vardb_path']}/{$interface}_ip"))
		$old_ip = trim(file_get_contents("{$g['vardb_path']}/{$interface}_ip", "\r"));
if($old_ip) {
	$helpers = exec("/bin/ps awux | grep \"{$old_ip}\" | grep -v \"grep\" | awk '{ print $2 }'");
	if($helpers)
	    mwexec("kill " . trim($helpers));
} else {
	log_error("WARNING! /etc/rc.newwanip could not deterimine the previous ip address ( $interface ).");
}

/* reconfigure IPsec tunnels */
vpn_ipsec_force_reload();

/* start OpenVPN server & clients */
exec("killall -HUP openvpn 2>/dev/null");

/* regenerate resolv.conf if DNS overrides are allowed or the BigPond
   client is enabled */
if (isset($config['system']['dnsallowoverride']) ||
	($config['interfaces'][$interface]['ipaddr'] == "bigpond"))
		system_resolvconf_generate(true);

/* fire up the BigPond client, if necessary */
if ($config['interfaces'][$interface]['ipaddr'] == "bigpond")
	interfaces_wan_bigpond_configure($curwanip);

/* perform RFC 2136 DNS update */
services_dnsupdate_process();
>>>>>>> FETCH_HEAD

/*
 * NOTE: Take care of openvpn, no-ip or similar interfaces if you generate the event to reconfigure an interface.
 *      i.e. OpenVPN might be in tap mode and not have an ip.
 */
if ($curwanip == "0.0.0.0" || !is_ipaddr($curwanip)) {
	if (substr($interface_real, 0, 4) != "ovpn") {
		if (!empty($config['interfaces'][$interface]['ipaddr'])) {
			log_error("rc.newwanip: Failed to update {$interface} IP, restarting...");
			send_event("interface reconfigure {$interface}");
			return;
		}
	}
}

<<<<<<< HEAD
/* XXX: This really possible? */
if (empty($interface)) {
	if (platform_booting())
		return;
	filter_configure();
	restart_packages();
	return;
}
=======
log_error("Informational: DHClient spawned /etc/rc.newwanip and the new ip is {$interface} - {$curwanip}.");

touch("/tmp/update_dyndns");

/* signal filter reload */
unlink_if_exists("/tmp/config.cache");
touch("/tmp/filter_dirty");

/* reload graphing functions */
enable_rrd_graphing();

/* restart packages */
if($old_ip <> "") 
	if($old_ip <> $curwanip) {
		exec("/etc/rc.start_packages");
		log_error("{$g['product_name']} package system has detected an ip change $old_ip ->  $curwanip ... Restarting packages.");
	}
>>>>>>> FETCH_HEAD

$oldip = "0.0.0.0";
if (file_exists("{$g['vardb_path']}/{$interface}_cacheip"))
	$oldip = file_get_contents("{$g['vardb_path']}/{$interface}_cacheip");

/* regenerate resolv.conf if DNS overrides are allowed */
if (!platform_booting())
	system_resolvconf_generate(true);

/* write the current interface IP to file */
if (is_ipaddr($curwanip))
	@file_put_contents("{$g['vardb_path']}/{$interface}_ip", $curwanip);

link_interface_to_vips($interface, "update");

unset($gre);
$gre = link_interface_to_gre($interface);
if (!empty($gre))
	array_walk($gre, 'interface_gre_configure');
unset($gif);
$gif = link_interface_to_gif($interface);
if (!empty($gif))
	array_walk($gif, 'interface_gif_configure');

$grouptmp = link_interface_to_group($interface);
if (!empty($grouptmp))
	array_walk($grouptmp, 'interface_group_add_member');

unset($bridgetmp);
$bridgetmp = link_interface_to_bridge($interface);
if (!empty($bridgetmp))
	interface_bridge_add_member($bridgetmp, $interface_real);

// Do not process while booting
if (platform_booting())
	return;

/* make new hosts file */
system_hosts_generate();

/* check tunneled IPv6 interface tracking */
switch($config['interfaces'][$interface]['ipaddrv6']) {
	case "6to4":
		interface_6to4_configure($interface, $config['interfaces'][$interface]);
		break;
	case "6rd":
		interface_6rd_configure($interface, $config['interfaces'][$interface]);
		break;
	case "dhcp6":
		if (isset($config['interfaces'][$interface]['dhcp6usev4iface']))
			interface_dhcpv6_configure($interface, $config['interfaces'][$interface]);
		break;
}

/* Check Gif tunnels */
if (!empty($gif)) {
	foreach($gif as $giftun) {
		$confif = convert_real_interface_to_friendly_interface_name($giftun['gifif']);
		if (!empty($confif)) {
			interface_configure($confif);
			system_routing_configure($confif);
		}
	}
}
if (!empty($gre)) {
	foreach($gre as $gretun) {
		$confif = convert_real_interface_to_friendly_interface_name($gretun['greif']);
		if (!empty($confif)) {
			interface_configure($confif);
			system_routing_configure($confif);
		}
	}
}

/*
 * We need to force sync VPNs on such even when the IP is the same for dynamic interfaces.
 * Even with the same IP the VPN software is unhappy with the IP disappearing, and we
 * could be failing back in which case we need to switch IPs back anyhow.
 */
if (!is_ipaddr($oldip) || $curwanip != $oldip || !is_ipaddrv4($config['interfaces'][$interface]['ipaddr'])) {
	/* IP changed, kill states accordingly */
	if ($curwanip != $oldip) {
		log_error("IP has changed, killing states on former IP $oldip.");
		pfSense_kill_states($oldip);
		if (isset($config['system']['ip_change_kill_states'])) {
			/* hidden config option to wipe all states if needed */
			log_error("Killing all states post-IP change.");
			filter_flush_state_table();
		}
	}
	
	/*
	 * Some services (e.g. dyndns, see ticket #4066) depends of
	 * filter_configure() to be called before, otherwise pass out
	 * route-to rules have the old ip set in 'from' and connection
	 * do not go through correct link
	 */
	filter_configure_sync();

	/* reconfigure static routes (kernel may have deleted them) */
	system_routing_configure($interface);

	/* reconfigure our gateway monitor */
	setup_gateways_monitor();
	
	/* reload unbound */
	services_unbound_configure();

	if (is_ipaddr($curwanip))
		@file_put_contents("{$g['vardb_path']}/{$interface}_cacheip", $curwanip);

	/* perform RFC 2136 DNS update */
	services_dnsupdate_process($interface);

	/* signal dyndns update */
	services_dyndns_configure($interface);

	/* reconfigure IPsec tunnels */
	vpn_ipsec_force_reload($interface);

	/* start OpenVPN server & clients */
	if (substr($interface_real, 0, 4) != "ovpn")
		openvpn_resync_all($interface);

	/* reload graphing functions */
	enable_rrd_graphing();

	/* reload igmpproxy */
	services_igmpproxy_configure();

	/* restart snmp */
	services_snmpd_configure();

	restart_packages();
} else {
	/* signal filter reload */
	filter_configure();
}

?>
